What is the easiest way to iterate over all the key/value pairs of a java.util.Map in Java 5 and higher?

问题

What is the easiest way to iterate over all the key/value pairs of a java.util.Map in Java 5 and higher?

回答1:

Assuming K is your key type and V is your value type:

for (Map.Entry<K,V> entry : map.entrySet()) {
  K key = entry.getKey();
  V value = entry.getValue();
  // do stuff
}

来源：https://stackoverflow.com/questions/585654/what-is-the-easiest-way-to-iterate-over-all-the-key-value-pairs-of-a-java-util-m